Volunteering is less fun for some, more fun for others. Depending on the team you are on I guess. I was on the Pro Tech team, and it was a jol. Nice team, and a great job! That said, I wouldn't do it again for the entry. There are entries going "cheap" now, so if you train hard and can go at the drop of a hat, entries become available. Also, have your ~85k ready. You need to pay for the entry by the end of April (if they do what they did last year).